I have done this twice so far and suppose I will do it again soon enough. The first time a friend asked me to make 2 identical lap quilts so her mother in a nursing home would not be out of her quilt when the other was taken home to be washed. When she died the 2 quilts were laid on her casket instead of flower.
The second one was a quilt I have mentioned here before. It was for my Aunt Mary. I was devoted to her and held her hand until she breathed her last breath in on this side and exhaled on the other side. I made her a purple quilt each block was a bible related block. She slept under it had home for about a year and then a year in the nursing home. It too was placed on her casket when she died instead of flowers. It is now on my own bed where I think about her frequently and the precious gift that came back to me.
So of course I think this is a wonderful idea a great way to create heirlooms. Just my own thoughts.